Changi Airport's Project Jewel is a terminal hub designed to make flying fun. (Credit: Changi Airport Group) Last time I was at Singapore's Changi Airport , I was waiting for my flight by relaxing at the swimming pool and sipping a Singapore Sling. I really didn't want to leave. Brimming with gorgeous tropical plants and stress-busting recliners, with an easy rail link to downtown, Changi is the most heavenly airport I've ever been to. It's almost a vacation unto itself, and makes some world air hubs feel like, well, hell. And though it often tops lists like the World Airport Awards , it's now adding a futuristic pleasure dome to ensure its global dominance: Project Jewel. Slated to open in 2018, the mixed-use bubble will be designed by a consortium led by Moshe Safdie, who also did Singapore's opulent Marina Bay Sands resort complex, and will feature a bubble-like structu...